This is the Faber FXG 100cf, 12.9L Hot Dip Galvanized Steel Scuba Tank 3442 psi Cylinder Features: Fill Capacity: 3442 psi Liters: 12.9 FX DOT-SP (Exempt) TC Approved Phosphatized-cleaned internal service ** Note on finish. The finish on hot dipped galvanized cylinders is not as cosmetically appealing as a painted cylinder. These cylinders tend to have an industrial look. It is common to see spots, stains or even grind marks. These blemishes are most noticeable when the cylinder is new and shiny. After some usage, typically a few dives, the zinc will darken and these blemishes will become far less noticeable.